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gstreamer/ext/mimic/gstmimdec.c

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/*
* GStreamer
* Copyright (c) 2005 INdT.
* @author Andre Moreira Magalhaes <andre.magalhaes@indt.org.br>
* @author Rob Taylor <robtaylor@fastmail.fm>
* @author Philippe Khalaf <burger@speedy.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include "gstmimdec.h"
GST_DEBUG_CATEGORY (mimdec_debug);
#define GST_CAT_DEFAULT (mimdec_debug)
static GstStaticPadTemplate sink_factory =
GST_STATIC_PAD_TEMPLATE (
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-msnwebcam")
);
static GstStaticPadTemplate src_factory =
GST_STATIC_PAD_TEMPLATE (
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw-rgb, "
"bpp = (int) 24, "
"depth = (int) 24, "
"endianness = (int) 4321, "
"framerate = (double) [1.0, 30.0], "
"red_mask = (int) 16711680, "
"green_mask = (int) 65280, "
"blue_mask = (int) 255, "
"height = (int) [16, 4096], "
"width = (int) [16, 4096]"
)
);
static void gst_mimdec_class_init (GstMimDecClass *klass);
static void gst_mimdec_base_init (GstMimDecClass *klass);
static void gst_mimdec_init (GstMimDec *mimdec);
static void gst_mimdec_dispose (GObject *object);
static GstFlowReturn gst_mimdec_chain (GstPad *pad,
GstBuffer *in);
static GstCaps *gst_mimdec_src_getcaps (GstPad *pad);
#if (GST_VERSION_MAJOR == 0) && (GST_VERSION_MINOR == 9) && (GST_VERSION_MICRO <= 1)
static GstElementStateReturn
gst_mimdec_change_state (GstElement *element);
#else
static GstStateChangeReturn
gst_mimdec_change_state (GstElement *element,
GstStateChange transition);
#endif
static GstElementClass *parent_class = NULL;
GType
gst_gst_mimdec_get_type (void)
{
static GType plugin_type = 0;
if (!plugin_type)
{
static const GTypeInfo plugin_info =
{
sizeof (GstMimDecClass),
(GBaseInitFunc) gst_mimdec_base_init,
NULL,
(GClassInitFunc) gst_mimdec_class_init,
NULL,
NULL,
sizeof (GstMimDec),
0,
(GInstanceInitFunc) gst_mimdec_init,
};
plugin_type = g_type_register_static (GST_TYPE_ELEMENT,
"GstMimDec",
&plugin_info, 0);
}
return plugin_type;
}
static void
gst_mimdec_base_init (GstMimDecClass *klass)
{
static GstElementDetails plugin_details = {
"MimDec",
"Codec/Decoder/Video",
"Mimic decoder",
"Andre Moreira Magalhaes <andre.magalhaes@indt.org.br>"
};
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_factory));
gst_element_class_set_details (element_class, &plugin_details);
}
static void
gst_mimdec_class_init (GstMimDecClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*) klass;
gstelement_class = (GstElementClass*) klass;
gstelement_class->change_state = gst_mimdec_change_state;
gobject_class->dispose = gst_mimdec_dispose;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
GST_DEBUG_CATEGORY_INIT (mimdec_debug, "mimdec", 0, "Mimic decoder plugin");
}
static void
gst_mimdec_init (GstMimDec *mimdec)
{
mimdec->sinkpad = gst_pad_new_from_template (
gst_static_pad_template_get (&sink_factory), "sink");
gst_element_add_pad (GST_ELEMENT (mimdec), mimdec->sinkpad);
gst_pad_set_chain_function (mimdec->sinkpad, gst_mimdec_chain);
mimdec->srcpad = gst_pad_new_from_template (
gst_static_pad_template_get (&src_factory), "src");
gst_pad_set_getcaps_function (mimdec->srcpad, gst_mimdec_src_getcaps);
gst_element_add_pad (GST_ELEMENT (mimdec), mimdec->srcpad);
mimdec->adapter = gst_adapter_new ();
mimdec->dec = NULL;
mimdec->buffer_size = -1;
mimdec->have_header = FALSE;
mimdec->payload_size = -1;
}
static void
gst_mimdec_dispose (GObject *object)
{
GstMimDec *mimdec = GST_MIMDEC (object);
gst_adapter_clear (mimdec->adapter);
g_object_unref (mimdec->adapter);
}
static GstFlowReturn
gst_mimdec_chain (GstPad *pad, GstBuffer *in)
{
GstMimDec *mimdec;
GstBuffer *out_buf, *buf;
guchar *header, *frame_body;
guint32 fourcc;
guint16 header_size;
gint width, height;
GstCaps *caps;
g_return_val_if_fail (GST_IS_PAD (pad), GST_FLOW_ERROR);
mimdec = GST_MIMDEC (GST_OBJECT_PARENT (pad));
g_return_val_if_fail (GST_IS_MIMDEC (mimdec), GST_FLOW_ERROR);
g_return_val_if_fail(GST_PAD_IS_LINKED(mimdec->srcpad), GST_FLOW_ERROR);
buf = GST_BUFFER (in);
gst_adapter_push (mimdec->adapter, buf);
// do we have enough bytes to read a header
while (gst_adapter_available (mimdec->adapter) >= (mimdec->have_header ? mimdec->payload_size : 24)) {
if (!mimdec->have_header) {
header = (guchar *) gst_adapter_peek (mimdec->adapter, 24);
header_size = GUINT16_FROM_LE (*(guint16 *) (header + 0));
if (header_size != 24) {
GST_WARNING ("invalid frame: header size %d incorrect", header_size);
gst_adapter_flush (mimdec->adapter, 24);
return GST_FLOW_ERROR;
}
fourcc = GST_MAKE_FOURCC ('M', 'L', '2', '0');
if (GUINT32_FROM_LE (*((guint32 *) (header + 12))) != fourcc) {
GST_WARNING ("invalid frame: unknown FOURCC code %d", fourcc);
gst_adapter_flush (mimdec->adapter, 24);
return GST_FLOW_ERROR;
}
mimdec->payload_size = GUINT32_FROM_LE (*((guint32 *) (header + 8)));
GST_DEBUG ("Got packet, payload size %d", mimdec->payload_size);
gst_adapter_flush (mimdec->adapter, 24);
mimdec->have_header = TRUE;
}
if (gst_adapter_available (mimdec->adapter) < mimdec->payload_size)
{
return GST_FLOW_OK;
}
frame_body = (guchar *) gst_adapter_peek (mimdec->adapter, mimdec->payload_size);
if (mimdec->dec == NULL) {
mimdec->dec = mimic_open ();
if (mimdec->dec == NULL) {
GST_WARNING ("mimic_open error\n");
gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
mimdec->have_header = FALSE;
return GST_FLOW_ERROR;
}
if (!mimic_decoder_init (mimdec->dec, frame_body)) {
GST_WARNING ("mimic_decoder_init error\n");
mimic_close (mimdec->dec);
mimdec->dec = NULL;
gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
mimdec->have_header = FALSE;
return GST_FLOW_ERROR;
}
if (!mimic_get_property (mimdec->dec, "buffer_size", &mimdec->buffer_size)) {
GST_WARNING ("mimic_get_property('buffer_size') error\n");
mimic_close (mimdec->dec);
mimdec->dec = NULL;
gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
mimdec->have_header = FALSE;
return GST_FLOW_ERROR;
}
}
out_buf = gst_buffer_new_and_alloc (mimdec->buffer_size);
GST_BUFFER_TIMESTAMP(out_buf) = GST_BUFFER_TIMESTAMP(buf);
if (!mimic_decode_frame (mimdec->dec, frame_body, GST_BUFFER_DATA (out_buf))) {
GST_WARNING ("mimic_decode_frame error\n");
gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
mimdec->have_header = FALSE;
gst_buffer_unref (out_buf);
return GST_FLOW_ERROR;
}
mimic_get_property(mimdec->dec, "width", &width);
mimic_get_property(mimdec->dec, "height", &height);
GST_DEBUG ("got WxH %d x %d payload size %d buffer_size %d", width, height, mimdec->payload_size, mimdec->buffer_size);
caps = gst_caps_new_simple ("video/x-raw-rgb",
"bpp", G_TYPE_INT, 24,
"depth", G_TYPE_INT, 24,
"endianness", G_TYPE_INT, 4321,
"framerate", G_TYPE_DOUBLE, 30.0,
"red_mask", G_TYPE_INT, 16711680,
"green_mask", G_TYPE_INT, 65280,
"blue_mask", G_TYPE_INT, 255,
"width", G_TYPE_INT, width,
"height", G_TYPE_INT, height, NULL);
// gst_pad_set_caps (mimdec->srcpad, caps);
gst_buffer_set_caps (out_buf, caps);
gst_caps_unref (caps);
gst_pad_push (mimdec->srcpad, out_buf);
gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
mimdec->have_header = FALSE;
return GST_FLOW_OK;
}
return GST_FLOW_OK;
}
#if (GST_VERSION_MAJOR == 0) && (GST_VERSION_MINOR == 9) && (GST_VERSION_MICRO <= 1)
static GstElementStateReturn
gst_mimdec_change_state (GstElement *element)
{
GstMimDec *mimdec;
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_READY_TO_NULL:
#else
static GstStateChangeReturn
gst_mimdec_change_state (GstElement *element, GstStateChange transition)
{
GstMimDec *mimdec;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
#endif
mimdec = GST_MIMDEC (element);
if (mimdec->dec != NULL) {
mimic_close (mimdec->dec);
mimdec->dec = NULL;
mimdec->buffer_size = -1;
mimdec->have_header = FALSE;
mimdec->payload_size = -1;
}
break;
default:
break;
}
#if (GST_VERSION_MAJOR == 0) && (GST_VERSION_MINOR == 9) && (GST_VERSION_MICRO <= 1)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
#else
return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
#endif
}
static GstCaps *
gst_mimdec_src_getcaps (GstPad *pad)
{
GstCaps *caps;
GST_LOCK (pad);
if (!(caps = GST_PAD_CAPS (pad)))
caps = (GstCaps *) gst_pad_get_pad_template_caps (pad);
caps = gst_caps_ref (caps);
GST_UNLOCK (pad);
return caps;
}
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